What Causes Lesser Degree Of Phlegm In Lungs?

I believe I have had H1N1 - though did not consider this until this week. First came on suddenly Dec 19 with sniffles. Since then have had all respiratory system involvement in stages - throat painful - used salt water gargle, stuffed and runny nose, seriously plugged left sinus under eye - used saline spray, went into lungs - lots of coughing and at other times it stays quiescent although feels irritated lower center, occasionally chest hurts. Have coughed up and lots of phlegm - dark yellow, green, and after a particularly heavy coughing spell may have light blood streaks and this has been when hard to catch my breath. I have not seen a doctor as was treating as just a viral cold,as my normal body temp 97 and highest was 99 and then immediately dropped to 95. Most recent 96/97 again. This is now 2 weeks. Nose still a little runny, not coughing much today, but am feeling "slightly clogged" in lower lung. Other meds for cold have been Benylin and Advil cold & sinus. I have also had a touch of diarhea, lack of appetite. My MS is currently asymptomatic and while lethargic have not had the onset of MS fatigue. I do not like to go to the mediclinic unnecessarily, but should I be considering going now after 2 weeks even though my primary problem now is lesser degree of phlegm in my lungs?.